Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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DUAL ACTION TOILET RIM MOUNTED TOILET BOWL CLEANER
BACKGROUND OF THE INVENTION
Field of the Invention
[0003] This invention relates to liquid dispensers, and in particular to
devices
for dispensing quantities of liquids, such as cleaning liquids and liquids
containing
a dissolved cleaning product, from under the rim of a toilet bowl.
o Description of the Related Art
[0004] Toilet bowls require care to prevent the buildup of unsightly deposits,
to
reduce odors and to prevent bacteria growth. Traditionally, toilet bowls have
been
cleaned, deodorized and disinfected by manual scrubbing with a liquid or
powdered cleaning and sanitizing agent. This task has required manual labor to
keep the toilet bowl clean.
[0005] In order to eliminate the manual scrubbing, various automatic
continuous cleaning toilet bowl cleaning products have been proposed. One type
of product comprises a solid block or solid particles of a cleansing and
freshening
substance that is suspended from the rim of a toilet bowl in a container that
is
2o placed in the path of the flushing water. U.S. Pat. No. 3,529,309 shows an
example of this type of toilet bowl cleaning system. Typically, a portion of
the
solid block is dissolved in the flush water with each flush, and the flush
water
having dissolved product is dispensed into the toilet bowl for cleaning the
bowl.
These solid block toilet cleaning systems have certain disadvantages such as a
2s short lifetime and a decline in the amount of cleaning and deodorizing
agents
released into the toilet bowl as the solid block deteriorates.
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[0006] Other automatic, continuous cleaning, toilet bowl cleaning systems use
a liquid cleaning agent that is dispensed into a toilet bowl. For example,
European Patent Application Nos. EP-0538957 and EP-0785315, U.S. Patent
Nos. 6,178,564 B1 and 6,230,334 B1, and PCT International Publication Nos.
WO 99/66139 and WO 99/66140 all disclose cleansing and/or freshening units
capable of being suspended from the rim of a toilet bowl for the purpose of
introducing liquid active substances from a bottle into the flushing water
with each
flush. Typically, the liquid active substances may include one of more of the
following: surfactants (such as a mixture of an anionic surfactant and a
nonionic
~o surfactant), solvents, sequesterants, pH controllers, thickeners,
preservatives,
fragrances, and dyes.
[0007] While these under the toilet rim liquid dispensing toilet bowl cleaning
systems provide an improved alternative to the solid block toilet cleaning
systems
described above, it may be difficult to incorporate certain toilet bowl
cleaning
~s actives, such as bleaches and various hypochlorites, into the liquid active
substance. In this regard, bleaches and hypochlorites may affect properties of
the
components of the liquid active substance. For example, bleaches and
hypochlorites will typically fade the color of a dye and destroy a fragrance
upon
extended contact. Also, certain incompatible cleaning actives may not be
stable
2o when mixed and through the resulting chemical interaction, the efficacy of
the
individual cleaning actives may be decreased. For instance, the efficacy of
certain
surfactants may be decreased by bleaches and hypochlorites. These limitations
in liquid dispensing cleaning systems have prevented the optimization of
toilet
bowl cleaning active substances in one liquid formulation. In particular, the
2s inability to incorporate bleaches and hypochlorites into a liquid active
substance is
especially detrimental as bleaches and hypochlorites are particularly
effective in
destroying bacteria and preventing biofilm formation.
[0008] Binary cleaning systems have been proposed for certain applications
such as drain cleaning. See, for example, U.S. Patent No. 3,968,048. In such
3o systems, the components are separately stored and mixed at the time of use.
However, manual mixing defeats the automatic nature of toilet bowl cleaning
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systems, and automatic mixing systems suitable for administering such two part
cleaners are too large and bulky for mounting under a toilet bowl rim.
[0009] One disadvantage with both solid block toilet bowl cleaning systems
and liquid dispensing toilet bowl cleaning systems is the timing in which
liquid
substances are delivered to the toilet bowl. Often, the dissolved solid
product and
the liquid substances are only delivered to the toilet bowl during a toilet
flush.
However, it has been discovered that one key to more effective toilet bowl
cleaning is having some cleaning actives remain in the bowl after the flush.
As a
result, solid block toilet bowl cleaning systems and liquid dispensing toilet
bowl
o cleaning systems that only deliver active cleaning substances to a toilet
bowl
during a flush may not achieve maximum cleaning effectiveness.
[0010] Therefore, there is a need for an improved device that can dispense
quantities of cleaning and freshening liquids from under the rim of a toilet
bowl
both during and after a flush and that can deliver a greater variety of
cleaning
s actives to a toilet bowl, including incompatible cleaning actives.
BRIEF SUMMARY OF THE INVENTION
[0011] The foregoing needs are met by a dispensing device according to the
invention in which a flow of water during a toilet flush is used to dispense
toilet
bowl treatment preparations into a toilet bowl. The dispensing device
comprises a
2o bottle for holding a liquid, a base for holding the bottle, a wicking
device supported
by the base, a container attached to the base, and means for suspending the
base from a rim of the toilet bowl. The bottle has a mouth and a closure for
covering the mouth, and the base has a piercing post. The wicking device is
configured to convey the liquid from the post to a dispensing position within
the
25 flow of water from a toilet flush. The container holds a dissolvable
product
(typically a solid), and is configured to permit water from the flow of water
to enter
the container during a toilet flush. The container also has an exit opening
configured to permit a mixture comprising water and dissolved product to be
released from the container into the toilet bowl.
30 [0012] The wicking device of the dispensing device may comprise any number
of different wicking structures including a dispensing plate having an upper
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surface including at least one feed channel in fluid communication with the
piercing post of the base, a plate with holes formed therein, or a porous pad.
In
one form, the wicking device is movably supported by the base such that the
wicking device can be adjusted to function with toilet bowls of different
shapes and
different flushing systems. The use of a movable wicking device assures that
liquid from the bottle can be conveyed from the piercing post to a dispensing
position within the flow of water during a toilet flush regardless of the
toilet bowl
shape or flushing system.
[0013] In one version of the invention, the container exit opening comprises a
o dispensing conduit configured to permit a mixture comprising water and
dissolved
product to be released from the container into the toilet bowl such that a
portion of
the mixture is released into the toilet bowl after the toilet flush is
complete. The
dispensing conduit of the container may comprise an approximately vertical
tubular conduit. Importantly, the container may also be configured such that
an
s amount of water from the flow of water remains in the container and contacts
the
dissolvable product after the toilet flush is complete. The container may
include a
housing and a cover capable of being opened to allow replacement of the
dissolvable product. In one form, the container attaches to the bottom end of
the
base by a snap fit engagement.
20 [0014] In a dispensing device according to the invention, the liquid and
dissolvable product dispensing systems work in concert when mounted in the
toilet bowl (on the rim) and flush water is washed over the dispensing device.
The
liquid dispensing system dispenses out an amount of liquid onto the wicking
device. This liquid may contain fragrance and surfactants that are necessary
to
2s provide toilet bowl freshening and foaming during the flush. When the
toilet is
flushed, flush water is directed over the wicking device to mix the liquid
with flush
water and deliver the diluted liquid to the toilet bowl. Also, when the toilet
is
flushed, flush water is directed into the container filling up the container
and
allowing the dissolvable solid product to mix with the water in the container.
Slots
3o in the container allow excess water to be directed out. The dispensing
conduit is
positioned as a drain mechanism metering out the water / dissolved solid
product
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mixture. The metering out of the water / dissolved solid product mixture can
be
adjusted to deliver the mixture slowly after the flush is complete. This delay
allows for the active cleaners in the dissolvable product to remain in the
bowl and
provide cleaning power between flushes. After each flush, a certain amount of
water is left within the housing to mix with the solid dissolvable product,
thereby
making a concentrated pool of water / dissolved solid product mixture for the
next
flush to dispense into the bowl during and after a flush.
[0015] It is therefore an advantage of the present invention to provide an
improved device that can dispense quantities of cleaning and freshening toilet
o bowl treatment preparations from under the rim of a toilet bowl both during
and
after a flush.
[0016] It is another advantage of the present invention to provide a device
that
can dispense a greater variety of cleaning actives to a toilet bowl from under
the
rim of a toilet bowl.
[0017] It is a further advantage of the present invention to provide a device
that
can dispense storage incompatible cleaning actives to a toilet bowl from under
the
rim of a toilet bowl such that most (or all) of the undesirable chemical
interaction
between the incompatible cleaning actives is preempted and the user will
benefit
from the superior properties of each of the incompatible cleaning actives
through a
2o single application of each of the incompatible cleaning actives.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] These and other features, aspects, and advantages of the present
invention will become better understood upon consideration of the following
detailed description, appended claims, and drawings where:
2s [0019] Figure 1 is a perspective view of a dispenser in accordance with the
invention;
[0020] Figure 2 is a vertical cross-sectional view of the dispenser shown in
Figure 1;
[0021] Figure 3 is an exploded perspective view of the dispenser shown in
so Figure 1;
[0022] Figure 4 is a rear view of the dispenser shown in Figure 1;
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[0023] Figure 5 is a front view of the dispenser shown in Figure 1;
[0024] Figure 6 is a top plan view of the dispenser shown in Figure 1;
(0025] Figure 7 is a bottom plan view of the dispenser shown in Figure 1;
[0026] Figure 8 is a side view of the dispenser shown in Figure 1, the other
side view being a mirror image;
[0027] Figure 9 is a partial cross-sectional view showing the means for
attaching the container to the base of the dispenser shown in Figure 1;
(0028] Figure 10 is another partial cross-sectional view taken along line 10-
10
of Figure 9 showing the means for attaching the container to the base of the
o dispenser shown in Figure 1;
[0029] Figure 11 is a partial cross-sectional view showing the dispensing
conduit of the container of the dispenser shown in Figure 1;
[0030] Figure 12 is a side view showing the dispenser shown in Figure 1
installed on an open rim type toilet bowl;
~5 [0031] Figure 13 is a view similar to Figure 12, but with the dispenser
shown in
Figure 1 installed on a box rim type toilet bowl;
[0032] Figure 14 illustrates schematically the manner in which a wicking
device
may be inserted into the base of the dispenser shown in Figure 1;
[0033] Figure 15 is a perspective view of a solid dissolvable product
container
20 of the dispenser shown in Figure 1;
[0034] Figure 16 is a perspective view of a wicking device that may be
inserted
into the base of the dispenser shown in Figure 1; and
[0035] Figure 17 is a perspective view of another version of a wicking device
that may be inserted into the base of the shown in Figure 1.
25 DETAILED DESCRIPTION
[0036] Referring to Figures 1 to 16, there is shown a liquid dispenser 10 for
dispensing toilet bowl treatment preparations from the rim of a toilet bowl.
The
dispenser 10 includes a base 20, a sprung suspension hook 40 for suspending
the base 20 from the rim of a toilet bowl (as shown in Figures 12 and 13), a
3o reservoir bottle 50 containing a liquid 58, a wicking device 60 that is
supported by
the base 20, and a solid dissolvable product container 80 that is attached to
the
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base 20. The liquid 58 used in the bottle 50 may be any liquid formula having
the
cleaning, foaming, disinfecting and fragrancing characteristics required for
the
specific toilet cleaning application. One example liquid 58 comprises an
anionic
surfactant, a nonionic surfactant, a solvent, a sequesterant, a base to
control pH,
s a thickener, a preservative, a fragrance, and a dye. Another example liquid
is
disclosed in European patent application no. EP 775,741 and comprises 1-25
wt.% perfume, 10-50 wt.% anionic or non-ionic surfactant, 1-20 wt.%
evaporation
regulator, and balance solvent. Once the liquid dispenser 10 is suspended from
a
toilet bowl such as that shown in Figures 12 and 13, a user inserts a sealed
o inverted reservoir bottle 50 into the base 20. The act of insertion causes a
seal on
the reservoir bottle 50 to break, in a manner to be described below. A wicking
device 60 which may be in the form of a dispensing plate or porous pad is
located
within the base 20, and this wicking device 60 conveys liquid 58 from the
reservoir
bottle 50 to a position within the stream of flushing water within the toilet
bowl by
~ 5 capillary action.
[0037] While a variety of materials may be used to form the base 20, the
suspension hook 40, the bottle 50 and the container 80, it is preferable to
manufacture these components from a thermoplastic material such as
polyethylene or polypropylene. Typically, the base 20, the suspension hook 40
2o and the container 80 comprise an opaque thermoplastic material such as
pigmented polyethylene or polypropylene, and the bottle 50 comprises a
transparent thermoplastic material such as clear polyethylene or
polypropylene.
For ease of manufacture, the suspension hook 40 is formed as a separate
component from the base 20, and the base 20 is formed with an integral guide
2s channel 21 (see Figure 2) of rectangular cross-section into which the lower
end of
the suspension hook 40 is inserted during assembly. The lower end of the
suspension hook 40 comprises a raised, chamfered portion 42, such that, upon
insertion, the hook 40 remains engaged withinathe channel 21 by a snap-fitting
arrangement.
30 [0038] The base 20 includes a side wall 24 that terminates at an upper edge
25. The side wall 24 and the upper edge 25 create a mounting structure that
holds
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the bottle 50 when the bottle 50 is installed on the base 20. The inner
surface of
the side wall 24 may also include ribs to further retain the bottle 50 in the
base 20.
In an inner central portion of the base 20, as best seen in Figure 2, there is
provided an annular channel 27 that runs adjacent a piercing post 30 that is
used
s to carry fluids from the bottle 50 when the liquid dispensing device 10 is
installed
on a toilet rim. The base 20 is also formed with a series of drain slots 28
(best
shown in Figure 5) at the bottom of the.front side which allow the flushing
water to
drain away from above the wicking device 60.
[0039] The installation of the bottle 50 on the base 20 is best shown in
Figures
0 2 and 3. The piercing post 30 of the base 20 comprises a cylindrical tubular
section 32 that defines a feed conduit 34. An upper end 33 of the tubular
section
32 terminates obliquely to form an elliptical mouth. The bottle 50 includes a
circular mouth 52 that is covered by a closure 54 that seals the liquid 58 in
the
bottle 50 for shipment and storage. In the version of the bottle shown in the
~ 5 Figure 3, the closure 54 is a thermoplastic cap with a channel that
engages a
circular flange at the mouth 52 of the bottle 50. Other closures, such as foil
or
plastic film, would also be suitable for sealing the mouth 52 of the bottle
50. The
central portion of the closure 54 shown in Figure 3 has a frangible seal with
a
circular area of reduced thickness.
20 [0040] During installation, the inverted bottle 50 is oriented over the
piercing
post 30 of the base 20 such that the circular inner wall of the closure 54
approximately lines up with the circular outer surface of the piercing post
30, and
the bottle is moved in a downward direction until the upper end 33 of the
piercing
post 30 causes the circular area of the frangible seal to fracture. The feed
conduit
2s 34 of the base 20 is then placed in fluid communication with the mouth 52
of the
bottle 50 and liquid 58 may flow from the bottle 50 through the feed conduit
34
and out of a dispensing hole 36 at the bottom of the piercing post 30 by way
of
gravity. By properly dimensioning the piercing post 30 and the closure 54 and
the
mouth 52 of the bottle 50, a fluid tight seal is formed when the bottle is
installed on
0 the base 20. The base 20 further comprises an outlet portion 38 in the form
of a
cylinder which bears against the wicking device 60.
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[0041] The manner in which the wicking device is installed in the base 20 and
the manner in which the position of the wicking device 60 can be adjusted by a
user is illustrated in Figures 12 to 14. The wicking device 60 is provided
with two
elongate guide slots 61 which are engaged by two corresponding spring fingers
22 in the base 20. The wicking device 60 in moved in the direction of arrow I
in
Figure 14 until the guide slots 61 are engaged by the spring fingers 22. The
guide
slots 61 serve to define the two extreme positions of the range of possible
positions of the wicking device 60 within the base 20. The functioning of the
adjustable wicking device 60 will now be described with reference to Figures
12
o and 13. Figure 12 illustrates the configuration of the dispensing device 10
when
used with a toilet 140 with an open rim. With the dispensing device 10
suspended
from the rim 160 of such a toilet 140, it can be seen that the stream of
flushing
water, indicated by the thick arrow W, contacts the wicking device 60 when the
wicking device 60 is in the fully-inserted position in the base 20. However,
when
~s used with a toilet 14b of the boxed-rim configuration, as shown in Figure
13, the
wicking device 60 is withdrawn in direction E shown in Figure 2 to a fully-
extended
position, as shown in Figure 13, so as to expose a portion thereof to the
stream of
flushing water, indicated by the thick arrow W, while ensuring that the outlet
portion 38 of the base 20 is still closed by the inner portion of the wicking
device
20 60. As described above, this is ensured by virtue of the guide slots 61
within the
wicking device 60 abutting the spring fingers 22 within the base 20.
[0042] Looking at Figures 6 and 16, the wicking device 60 may include
capillary feed channels 62a that are arranged in a radiating fashion or
capillary
feed channels 62b that are arranged in parallel fashion in the top surface of
a non-
25 porous plate 64. A recess 63 is formed within the wicking device 60 to
accommodate fluid from the inverted reservoir bottle 50. The wicking device 60
is
attached to the base 20 such that the recess 63 of the wicking device 60 is
placed
in fluid communication with the feed conduit 34 of the base 20. In the version
of
the wicking device 60 shown in Figure 2, the outlet portion 38 at the bottom
of the
3o piercing post 30 is used to provide a fluid path between feed conduit 34
and the
recess 63 of the wicking device 60. As a result of this configuration, liquid
flows
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out of the bottle 58, into the feed conduit 34 of the base 20, through the
outlet
portion 38 and into the recess 63 of the wicking device 60. Liquid 58 then
flows
from the recess 63 of the wicking device 60 into the capillary feed channels
62a in
the upper surface of the wicking device 60. The liquid then continues to move
toward the outer end of the capillary feed channels 62a where the liquid is
mixed
with flush water as described above with reference to Figures 12 and 13.
Various
means can be used to move the liquid from the recess 63 of the wicking device
60
into the capillary feed channels 62a or 62b. For example, the capillary action
provided by adherence of the fluid to the sides of the capillary feed channels
62a
0 or 62b serves to move the liquid toward the outer end of the capillary
channels
62a or 62b. After the flushing water washes liquid from the wicking device 60
into
the toilet water, a fresh supply of liquid 58 is distributed from the bottle
58 to the
wicking device 60 as described above.
[0043] The structure of the container 80 and the manner in which the container
~ 5 80 is attached to the base 20 are best illustrated in Figures 2, 3, 9, 10
and 11.
The container 80 includes a housing 82 having an outer wall 83. The outer wall
83 defines a mixing chamber 85 in the housing 82. A dispensing conduit 94
(best
shown in Figures 2 and 11 ) extends upward in the housing 82. Preferably, the
dispensing conduit 94 comprises an approximately vertical tubular conduit. The
2o dispensing conduit 94 is in fluid communication with the mixing chamber 85.
The
dispensing conduit 94 ends in a dispensing hole 95. The inner lower surface of
the housing 82 may also include upwardly extending retaining walls 88 that
hold a
solid dissolvable cleaning product 98 (see Figures 10 and 15).
[0044] Some examples of suitable solid dissolvable cleaning products can be
2s found in U.S. Patent Nos. 6,184,192 and 5,945,390, which are incorporated
herein
by reference as if fully set forth herein. Preferably, the solid dissolvable
product
includes a bleaching agent, such as hydrogen peroxide, sodium peroxide, sodium
chlorite, hypochlorous acid and mixtures thereof, or a chlorine releasing
agent,
such as chloroisocyanurates, hypochlorites, chlorosuccinimides, sodium para-
3o toluene sulfochlorine, chlorodimethyl hydantoins, and mixtures thereof. One
example solid dissolvable product comprises a solid chloroisocyanurate, such
as
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an alkali metal chloroisocyanurate (e.g., sodium dichloroisocyanurate or
sodium
trichloroisocyanurate), and a water-soluble salt (which may be a mixtures of
salts).
Examples of water-soluble salts include various alkali metal and/or alkaline
earth
metal sulfates and chlorides, such as sodium sulfate, calcium sulfate, sodium
chloride, potassium sulfate, calcium chloride, magnesium chloride, and
magnesium sulfate. Optionally, the solid dissolvable product 98 may include a
binder (e.g., a cellulose binder such as hydroxy ethyl cellulose,
hydroxypropyl
methyl cellulose, hydroxy propyl cellulose, methyl cellulose, ethyl cellulose,
sodium carboxymethyl cellulose, ethyl hydroxyethyl cellulose, and
carboxymethyl
cellulose).
(0045] Certain components of the solid dissolvable product 98 may be
incompatible with certain components of the liquid 58. As used herein,
components are "incompatible" if the components are not stable over an hour of
storage when mixed such that the efficacy of either of the individual
components
for their intended use is decreased. For example, two cleaning components are
incompatible if a mixture of the two components decreases the cleaning
effectiveness of one of the components, or a cleaning component and a dye are
incompatible if a mixture of the two decreases the coloring effectiveness of
dye
and/or the cleaning effectiveness of the cleaning component.
[0046] In the container 80, a closure flap 90 is attached to an upper edge on
one side of the housing 82 by way of a living hinge 92. The closure flap 90
includes slots 91 that extend through the closure flap 90. The slots 91 allow
for
easier ingress and egress of water into the housing 82. After the dissolvable
product 98 is moved into the housing in direction D and placed on the
retaining
walls 88 in the housing 82, the closure flap 90 is moved in the angular
direction A
shown in Figure 15 to contain the product 98 in the container 80. The closure
flap
90 is held in place by a snap catch 93 (shown in Figure 2) on an inner wall of
the
housing 82. This provides child-resistant properties to the closure flap 90.
One
side of the upper portion of the housing 82, there are provided a plurality of
drain
so slots 86. A pair of mounting tabs 87 extend upwardly from opposite ends of
the
inner lower surface of the housing 82 and are used to attach the container 80
to
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the base 20. Specifically, the container is moved in direction U in Figure 14
until
each of the mounting tabs 87 engages an inner surface of the outer wall 83 of
the
container 80 and an inner wall 26 of the base 20 in a press fit (snap fit)
engagement as best shown in Figures 9 and 10. Of course, other attachment
mechanisms such as adhesives would also be suitable.
[0047] Having described the structure of the dispenser 10, the operation of
the
dispenser 10 can be explained further. After the bottle 50 is installed in the
base
20 of the dispenser 10 as described above, and the dispenser 10 is installed
on a
toilet bowl rim with proper adjustment of the wicking device 60 as described
above
o with reference to Figures 12 and 13, the dispenser 10 is ready for
operation. The
liquid 58 flows out of the bottle 50, into the feed conduit 34 of the base 20,
through
the outlet portion 38 and onto the wicking device 60. Liquid 58 then flows
toward
the outer end of the wicking device 60 by way of capillary action of the
capillary
channels 62a or 62b as described above. When the toilet is flushed the liquid
58
s is mixed with flush water as described above with reference to Figures 12
and 13.
A mixture including flush water and liquid 58 is then distributed into the
toilet.
After the flushing water washes liquid 58 from the wicking device 60 into the
toilet
water, a fresh supply of liquid 58 is distributed from the bottle to the
wicking device
60 as described above.
20 [0048] Also when the toilet is flushed, water from the flow of flush water
enters
the container 80 and serves to distribute a mixture 99 comprising water and
dissolved product into the toilet bowl. This process can be best described by
reference to Figures 2, 11, 12 and 13. First, water from the flow of flush
water
enters the housing 82 of the container 80. Optionally, liquid 58 from the
bottle 50
2s may also be directed into the container 80. The flush water (and optionally
liquid
58) then mixes with the solid dissolvable product 98 and a mixture 99
comprising
water and dissolved product is formed in the mixing chamber 85. Excess water
and some dissolved product is directed away from the container 80 in direction
X
by way of the drain slots 86 (best shown in Figures 12 and 13) and into the
toilet
3o bowl.
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[0049] The dispensing conduit 94 of the container 80 provides a drain
mechanism for metering out the water / dissolved solid product mixture 99 that
is
formed in the mixing chamber 85. The water / dissolved solid product mixture
99
exits the dispensing conduit 94 of the container 80 in direction M (best shown
in
Figures 11-13) and into the toilet bowl. By carefully choosing the dimensions
of
the dispensing conduit 94 and the dispensing hole 95, the metering out of the
water / dissolved solid product mixture can be adjusted to deliver the water /
dissolved solid product mixture 99 slowly after the flush is complete. This
delay
allows for the active cleaners in the solid dissolvable product 98 to remain
in the
o toilet bowl and provide cleaning power between flushes. Also, after each
flush, a
certain amount of water is left within the housing 82 to mix with the solid
dissolvable product 98, thereby making a concentrated pool of water /
dissolved
solid product mixture for the next flush to dispense into the bowl during and
after a
flush (see element 99 in Figure 11 ).
~5 [0050] Turning now to Figure 17, there is shown a perspective view of an
alternative structure of the wicking device. The wicking device is in the form
of a
dispensing plate 70 having the same overall shape as the wicking device 60
that
is illustrated in Figures 1-16, with elongate guide slots 72 that provide
adjustability
of position of the plate 70 to accommodate different lavatory geometries as
2o described above with reference to Figures 12 and 13. In this embodiment of
the
wicking device, the plate 70 is solid apart from a number of raised through-
holes
73 formed in the plate. In operation of a dispenser having this plate 70,
liquid 58
flows out of the bottle 58, into the feed conduit 34 of the base 20, through
the
outlet portion 38 and onto the plate 70. When the toilet is flushed, the
liquid 58 is
2s mixed with flush water as described above with reference to Figures 12 and
13. A
mixture including flush water and liquid is then distributed into the toilet
through
through-holes 73 in the plate 70. The through-holes 73 are sufficiently small
to
prevent the undiluted liquid 58 from passing through. After the flushing water
washes liquid through through-holes 73 in the plate 70 into the toilet water,
a fresh
3o supply of liquid 58 is distributed from the bottle 50 to the plate 70 as
described
above.
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[0051] A second alternative structure of the wicking device is a porous pad
that
is used to provide a fluid path between the bottle 50 and a dispensing
position
within the stream of flush water. In this configuration, liquid 58 flows out
of the
bottle 58, into the feed conduit 34 of the base 20, through the outlet portion
38 and
onto the porous pad. The liquid then continues to move toward the outer end of
the porous pad by capillary action where the liquid is mixed with flush water
as
described above with reference to Figures 12 and 13.
[0052] The use of both the cleaning, foaming, disinfecting and fragrancing
liquid 58 and the solid dissolvable product 98 in the dispenser 10 provides
for
o many advantages. For example, the solid dissolvable product 98 may include a
bleaching agent or a chlorine releasing agent that would be incompatible with
a
dye in the liquid 58. By segregating the liquid 58 and the solid dissolvable
product
98 in the dispenser 10, the bleaching agent or the chlorine releasing agent in
the
solid dissolvable product 98 cannot affect the coloring properties of the dye
in the
liquid 58. In fact, the segregation of the liquid 58 and the solid dissolvable
product
98 would be advantageous in any situation where the solid dissolvable product
98
includes at least one component that is incompatible with at least one
component
of the liquid 58. The use of the dispensing conduit 94 and the dispensing hole
95
also provides for advantages. By carefully choosing the dimensions of the
2o dispensing conduit 94 and the dispensing hole 95, the metering out of the
water /
dissolved solid product mixture can be adjusted to deliver the water /
dissolved
solid product mixture slowly after the flush is complete. In this manner, more
effective toilet bowl cleaning is achieved by having some cleaning actives
remain
in the bowl after the flush.
2s [0053] Advantageously, the liquid dispenser 10, the cleaning, foaming,
disinfecting and fragrancing liquid 58, and the solid dissolvable product 98
can be
designed such that the supply of liquid 58 and the solid dissolvable product
98 are
used up in substantially the same time period. Various methods can be used to
assure that the liquid 58 and the solid dissolvable product 98 are used up in
the
3o same time period. One method involves the control of the concentration of
components in the solid dissolvable product 98. In this example method, the
solid
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dissolvable product 98 comprises a solid chloroisocyanurate, such as sodium
dichloroisocyanurate or sodium trichloroisocyanurate, and a water-soluble salt
such as sodium sulfate. The ratio of solid chloroisocyanurate to water soluble
salt
is adjusted to allow for various dissolution rates for the solid dissolvable
product
s 98. When a faster dissolution rate is desired for the solid dissolvable
product 98,
the ratio of solid chloroisocyanurate to water soluble salt is decreased as a
higher
level of the water-soluble salt serves to increase the release rate of the
solid
dissolvable product 98 into the flush water. In the same manner, the ratio of
solid
chloroisocyanurate and water soluble salt is increased when a slower
dissolution
o rate is desired for the solid dissolvable product 98. By measuring the
dispensing
rate for the liquid 58 and adjusting the ratio of solid chloroisocyanurate and
water
soluble salt in the solid dissolvable product 98, it is therefore possible to
assure
that the liquid 58 and the solid dissolvable product 98 are used up in the
same
time period. Of course, other variables that affect the dispensing rates of
the
15 liquid 58 and the solid dissolvable product 98 can be varied and controlled
in order
to assure that the liquid 58 and the solid dissolvable product 98 are used up
in the
same time period. For example, the volume of the liquid 58 and the solid
dissolvable product 98 used can be varied, the size of the bottle 50 and the
container 80 can be varied, and the size of the dispensing conduit 94 and the
2o dispensing hole 95 can be varied.
[0054] Thus, there has been provided a device for dispensing toilet bowl
treatment preparations, such as cleaning liquids and liquids containing a
dissolved
cleaner, from under the rim of a toilet bowl by way of the flow of water
during a
toilet flush. The dispensing device fulfills a need for an improved device
that can
2s automatically dispense quantities of cleaning and freshening toilet bowl
treatment
preparations from under the rim of a toilet bowl both during and after a
flush. The
device can dispense a greater variety of cleaning actives to a toilet bowl
from
under the rim of a toilet bowl, and in particular can dispense incompatible
cleaning
actives to the toilet bowl such that most of the chemical interaction between
the
3o incompatible cleaning actives is preempted and the user will benefit from
the
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superior properties of each of the incompatible cleaning actives through a
single
application of each of the incompatible cleaning actives.
[0055] Although the present invention has been described in considerable
detail with reference to certain embodiments, one skilled in the art will
appreciate
that the present invention can be practiced by other than the described
embodiments, which have been presented for purposes of illustration and not of
limitation. Therefore, the scope of the appended claims should not be limited
to
the description of the embodiments contained herein.
INDUSTRIAL APPLICABILITY
o [0056] The invention may be used for dispensing liquids, such as cleaning
liquids and liquids containing a dissolved cleaner, from under the rim of a
toilet
bowl by way of the flow of water during a toilet flush.
